Carburetor



Nov. 2l, 1950 J. M. J. F. MEYNIER CARBURETOR Filed April s, 194s Patented Nov. 21, 1950 UNITED STATE S PATENT OFFICE CARBURETOR A i Meynier, deceased Application April 6, 1946, Serial No. 669,056

In France August 7; 1939 Section 1, Public Law 690, August 8, 1946 Patent expires August 7, 1959 v `l My invention has-for its object a 'carburetter chiey for internal combustion engines characterized by the following features which may be applied simultaneously or separately.

In the iirst place the Carburation of the air is effected by constraining the air to lick one surface of a porous partition which may be of porous china or the like earthenware and the other surface of which is in contact with the liquid fuel.

Furthermore the porous wall may assume the shape of two coaxial cylindrical elements between which a space is provided for containing the fuel.

According to a still further feature of my invention, a sliding sleeve may move inside the cylinder under the action of the depression in the engine so as to modify the operative surface of the china which is actually licked.

Lastly, Carburation for idling of the engine may be obtained through a licking or sweeping action of the air over the outer wall of the outer cylinder, while carb-uration for power operation is obtained through a licking or a sweeping of the air over the internal surface of the inner cylinder. Or again the reverse arrangement may be provided.

I will now describe by way of example, and by no means in a limited sense, a form of execution of a carburetter according to my invention. Said form of execution is illustrated in accompanying drawings wherein Fig. 1 is an axial cross-section,

Fig. 2 is a cross-section through line, 2--2 of Fig. 1.

The carburetter includes a cylindrical casing l provided at its lower end with a certain number of perforations 2; the space inside said cylindrical casing I is closed at its lower end by a transverse partition 3; said partition 3 is provided with a central opening 4 forming a conical seat.

The lower compartment 5 bounded by or formed inside the bottom member 6 communi- `cates with the outer atmosphere through ports 'I `adapted to produce a circulation of air through the casing which is much more considerable than that afforded by the perforations 2.

The partition 3 carries in a fluid tight manner va body 8 of porous material, for example of the china material used generally for ltration purposes, and including an inner annular element 9 and an outer annular element I0, said elements being connected at their upper end through the transversal member I I. The porous body 8 is advantageously made of one part. It provides between the elements B and I II an annular interval 1`Claim. (Cl. 261-99) 2 or chamber I2 communicating with a reservoir-or a supply of liquid fuel.

Inside the annular interval or chamber I2 is arranged a plunger tube IZa which may be of capillary size and which stretches up to a point very near the connecting member II and opens into the atmosphere above the liquid inside the chamber I2.

Inside the central chimney I3 of the body 8 is arranged a movable closing member I4 which is substantially sleeve-shaped and which terminates at its lower end in a conical part I5 cooperating with the seat 4. The movable closing member i4 moves over and along a guiding member I 4a rigid with a spindle It secured to the transverse partitions Il and 6. A spring ZI) is inserted between the guiding member Ida and the conical part I5.

The weight of the movable closing part I4 is chosen in relationship with `the size of the chimney I3.

The porous body 8 carries an upper transverse partition I'I separated towards its periphery from the casing I by an annular gap I8; the central part of said partition II is provided with perforations IS.

The concave portion 2! forming the upper part of the casing I opens into an admission pipe 22 the entrance into which is coptrolled by an admission throttle valve 23. A pipe 24 provides for the admission of gasoline into the annular charnber I2.

The operation of my improved carburetter is as follows:

For idling, the conical part I4 rests on the conical seat 4 as illustrated in Fig. l. The air sucked in by the motor enters then into the carburetter through the perforations 2 and ilows through the interval comprised between the outer annular element I9 and the casing I. The air licks the outer wall of said element whereby it becomes loaded with gasoline or the like liquid fuel; it then reaches the admission pipe 22 through the annular gap I3.

The pipe I2a serves to blow oif the air pushed ahead by the in-flowing gasoline.

The weight of the movable member I4, its diameter, its length, the strength of the antagonistic spring 2B, the weight of the whole system, the diameter of the inner element 9 form means allowing a very simple and very accurate adjustment.

What I claim is:

A carburetter for liquid fuel in internal combustion engines comprising an outer perforated cylindrical casing, an element of porous material mounted inside the casing with a narrow annular gap between it and said casing, said element being constituted by two substantially coaxial cylinders dening Ibetween one another an annular chamber for a liquid fue1, means for admitting said liquid into the lower end of said chamber, means for venting the air from the upper end Vof said chamber, a support for the porous element secured to the casing provided with an inner chamber communicating with the vatmosphere and with the chamber dened by the inner cylinder, a valve adapted to close the communication between the chamber in the support and last mentioned chamber, a spring urging said valve into its operative closing position, against the suction of the engine and means whereby the engine is adapted to suck air through the perforations of the casing and through the support and to cause the same to sweep over the wall of the outer cylinder and over the inner wall ofthe inner cylinder and to be laden thereby with vaporized fuel.

MEYNIER, JACQUES MARIE JEAN FRDRIC.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED 'STATES PATENTS Number Name Date 432,842 Sherman July 22, 1890 985,515 Dorman Feb. 28, 1911 1,327,205 Hesterwood Jan. 6, 1920 1,896,786 Oppenheim Feb. 7, 1933 FOREIGN PATENTS Number Country Date v207,217 Great Britain Nov. 12, 1923 235,672 Great Britain Apr. 3, 1924 861,822 France Nov. 12, 1940 

